Webster's New World Medical Dictionary

urine, blood in the
See 
hematuria.
urine pH
A measure of the acidity or alkalinity of
urine. Checking urine pH is part of the routine uri-
nalysis. Factors that affect urine pH include vomit-
ing, diarrhea, lung disease, hormones, kidney
function, and urinary tract infection.
urine test
See 
urinalysis.
urogenital
Relating to both the urinary system
and the genital system (the interior and exterior
genitalia).
urography
A method for examining the structure
and functionality of the urinary system. A special dye
is injected, and an X-ray machine records the dye’s
progress through the urinary tract. Urography is
particularly useful for discovering cysts or other
internal blockages.
urolithiasis
The process of forming stones in the
kidney, bladder, and/or urethra. See also 
kidney
stone.
urologist
A physician who specializes in diseases
of the urinary organs in females and the urinary and
sex organs in males.
urticaria
See 
hive.
USFDA
The United States Food and Drug
Administration. See 
Food and Drug Administration.
Usher syndrome
The most common disease that
diminishes both hearing and vision, a group of
genetic disorders in which retinitis pigmentosa (an
eye disease that causes vision to deteriorate over
time) is combined with congenital deafness. The
hearing loss in a patient with Usher syndrome
occurs in both ears as a result of nerve deafness.
Some patients also have balance problems because
of lack of vestibular reflexes for balance. More than
half of all deaf-blind people have Usher syndrome.
The syndrome is inherited in an autosomal reces-
sive manner.